the isosceles trapezoid (like an isosceles triangle)... Properties of the sides of an isosceles trapezoid: trapezoid. The bases (top and bottom) of an isosceles trapezoid are parallel. Opposite sides of an isosceles trapezoid are the same length (congruent). read more
A trapezoid is a quadrilateral with exactly one pair of parallel sides (the parallel sides are called bases). The following figure shows a trapezoid to the left, and an isosceles trapezoid on the right. read more
So the characteristics are: The bases (top and bottom) are parallel; Opposite diagonal sides are the same length; Interior angles on either side of bases are the same (congruent) Hence, the gradients of the two diagonal sides are equal. An isosceles trapezoid is a bit like if you had an isosceles triangle and you cut the top of it anywhere. read more